Why do we use the term formula unit for ionic compounds instead of the term molecule? 1) In ionic compounds the ratio between cations and anions is given by the formula for the molecule.
2) In ionic compounds the ratio between cations and anions is given by the formula unit.
3) Ionic compounds consist of continuous arrays of cations and anions.
4) Ionic compounds consist of cations and anions present in a constant ratio.
5) The term is incorrect because ionic compounds exist as molecules.